Zeph's Coupon module adds a proactive dimension to your phpShop store. Just offering a sale price will not prompt a user to purchase. Coupon shopping has become a driving force on the Internet. The shopper, the person them self, has to be made to feel special. By being given a unique discount code, they are more apt to purchase. Coupons can be complex or simple in nature. This module will allow you to, apply flat rate discount, apply Percentage based discount, Configure a starting and ending date range, Restrict the number of times it can be used, Restrict the coupon to a specific user.
Can be easily extended.